Synergistic effect of microwave heating and hydrothermal methods on synthesized Ni2CoS4/GO for ultrahigh capacity supercapacitors.

A simple and efficient strategy that takes advantages of the synergistic effect of microwave heating method and hydrothermal method is used to synthesize Ni2CoS4/graphene oxide (MH-Ni2CoS4/GO). Firstly, Ni2CoS4 nanoparticles are observed to grow uniformly on the surface of GO. Then the obtained MH-Ni2CoS4/GO electrode is tested and it demonstrates ultrahigh specific capacitance of 2675.0 F g-1 at the current densities of 2 A g-1, fantastic stability of 95.0% even after 2000 cycles at 30 A g-1 and excellent rate capability of 89.7% with current density increasing from 2 A g-1 to 30 A g-1. Moreover, the assembled AC//MH-Ni2CoS4/GO asymmetric supercapacitor also delivers a good specific capacitance of 126.5 F g-1 at 0.5 A g-1, outstanding stability of 97.0% after 2000 cycles at 5.0 A g-1, and an ultrahigh energy density of 59.6 Wh kg-1 at power density of 497.6 W kg-1. This work provides an approach to synthesize electrode materials with superior excellent performances and it can be easily scaled up for practical applications in supercapacitors.

Mannose: Good player and assister in pharmacotherapy.

Mannose is a monosaccharide widely distributed in body fluids and tissues, especially in the nerve, skin, testicles, retina, liver and intestines. It is used to synthesize glycoproteins and participate in immune regulation. In recent years, mannose has been applied more and more widely in the biomedical context as people have a deeper understanding of its biological effects. This review introduces the use of mannose in treating various diseases (including cancer, urinary tract infections, type 1 diabetes, and diabetic wounds), preventing pancreatic fistula, and improving magnetic resonance imaging for acute pancreatitis. We also demonstrate that mannose has the potential for clinical applications.

Porous nanorods of nickel-cobalt double hydroxide prepared by electrochemical co-deposition for high-performance supercapacitors.

Nickel-cobalt double hydroxides (Ni-Co DHs) combined with cost-effectively commercial expanded graphite (EG) was prepared via a facile in-situ electrodeposition in mixed solvents of N,N-dimethylformamide and water. By simply adjust molar ratios of Ni2+/Co2+, a Ni-Co DHs/EG electrode in which Ni-Co DHs showing a porous-nanorod microstructure was fabricated. Thanks to synergistic effects between Ni(OH)2 and Co(OH)2 as well as the unique morphology of porous nanorods, an optimal Ni-Co DHs/EG electrode with a total mass loading of 4.0 mg cm-2 can deliver a specific capacitance of 1246 F g-1 at 1 A g-1, a rate capability of 91.8% as the discharging current density increasing from 1 to 10 A g-1, and a capacitance retention of 80.1% after 1000 cycles charged/discharged at 10 A g-1. Thus we can draw a conclusion that the Ni-Co DHs/EG electrode possesses a satisfactory specific capacitance, extremely superior rate performance, and good cycle stability, therefore it can be very competitive for practical applications in supercapacitors.